CETANE IMPROVER LINEAR PROGRAMME MODEL

Linear programme models are an important part of the scheduling and blend optimisation
process. The calculations are too complex to optimise manually and spreadsheets
backed up with optimisation routines are in general use. Adding Cetane Improver
to a schedule changes the optimum blend formulations and depending on current economics
and product demands, can be an essential blending component.

The additional boost of up to 5 cetane numbers makes possible the sourcing of potentially
lower cost higher density feeds and inclusion of higher levels of cracked components
such FCU Light Cycle Oils. The diesel pool can also be broadened with lower boiling
range kerosenes to increase overall yields and blend profitability given the correct
cost drivers in the market.

The Excel download above, CetaneLP.xlsm includes a Solver routine to optimise blend
schedules to a profit objective. The main blend specifications are estimated with
blending indices and constraints placed on the blend formulations for the predicted
analysis to be within the blend specification. Several blends can be made from a
series of components. Cetane improver can be added to the calculation and the formulations
recalculated to the optimum profit.

The CetaneLP.xlsm is set-up with an example scenario and macro to increment cetane
improver and check the increase in schedule profit. Support is provided to help
use and set-up the Solver add in for this routine: e-mail support@cetane.eu.